Coating for heated surfaces



Aug. 8, 1939. e. w. WARDWELL/JR COATING FOR HEATED SURFACES Filed Nov. 25, 1936 v Ill GeOrge W. wrciv vel L F;

y His Attorney.

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new Aug. 8, 1939 [mm-:1) STATES PATENT OFFICE 2,169,118 i .....fl3."?.if.li 555.27.33 .11..-

ortoGencralElectl-i :oiNuvYol-k e Company, a corporation Application November 25, 1936. Serial mi. 112.139 3. 0m (01. H)

The present invention relates to a protective coating for heated suriaces, which decreases the danger of burning due to accidental contact therewith.

The object of my invention is to provide an improved coating of this nature.

In the accompanying drawing. Fig. 1 is an end elevation of an ironing press equipped with a shoe embodying my invention, and Fig. 2 is an enlarged-iragmentary sectional view of the shoe.

The coating embodying my invention is particularly adapted for coating the housings or outer casings of electrically heated appliances such as ironers. waiile irons, toasters, hair dryers. etc. Irons, for example, are operated at temperatures of from 250 F. to 450 F., and the outer casing will therefore normally be at a high enough temperature to cause burning or at least some discomfort upon accidental contact therewith. l'or the purpose ofillustration. I have shown my invention applied to an ironing press of the type shown in my application Serial No. 750,620 filed Oct. 30, 1934, which has matured into Patent No. 2,135,266, granted Nov. 1, 1938. In this construction the pressure developing mechanism is contained within a cylinder l having a flange 2 for supporting the cylinder on the Within the cylinder is a piston at the top of which is mounted a suitably padded buck 4. On the. lower end of the cylinder is pivoted a carriage 5 having an arm I which supports a heated shoe I. The shoe is moved into and out of register of the buck by means of handle 8 attached to the front end oi the shoe. The rearward movement 01' the carriage is limited by a spring lconnected to toggle links I. and H which are respectively pivoted to the cylinderandto the carriage.

The construction of the shoe is shown in detail in Pig. 2. The shoe comprises a metal casting [2 preferably of a material having good heat conductivity. such as aluminum. The shoe is heated by an electric heating element, It enclosed in a metal sheath which is held in a groove II in the upperi'ace of the casting l! by means oi clamps Ii. The lower iace ll of the casting It serves as the work contacting surface. The upperiaeeotthecasting lzisenclosedbyasheet metal cover I l which is suitably attached thereto mimmasotoiwr. Itstemperatureis, howevenusuallyhiahenoughtocauseamnediscomicrtandpoasiblyevenbmningoftbeoperators hand in case of accidental contact therewith. Ihordertoeliminatethisdanger,1have aniodo-lihecoatingcntheoutermiace oi! the cover which comprises short fibers or flock I! held on the cover by a coating of a suitable cement 2|, such as a varnish. The fioclr may comprise any suitable fibers, for example finely ground cotton. The coating may be applied by first coating the cover with the varnish and blowing the flock by means 01' compressedairlmnstthevarnishbeioreithas dried. This provides a coating in which the inner ends of the fibers are embedded in the varnish and the outer ends of the fibers project outwardly away from the varnish. The arrangement of the fibers will, of course, not be uniform as shown in Fig. 2, but a large number of the fibers will proiect substantially perpendicularly from the varnishfilmasillustrated. Ifind that thiscoating eliminates all danger of burning or discomfort caused by accidental contact with the shoe cover. This is not due to the heat insulating properties of the flock but is rather due to the fact that the fiock prevents good contact between the operators' hand and the shoe cover. thus decreasing the rate 01 heat transfer.

WhatIclaimasnew anddesiretosecureby Letters Patent of the United States is:

1. In an ironcr, a shoe comprising a heated metallic body having a work engaging lace and.

havingv a metal cover enclosing the opposite face,

anda suede-like coating on the outside of said cover comprising fiock held thereon by a cement,

said coatingbeingrelativelythinsoasnottobe substantially heat insulating and having a large number of fibers projecting from said cement so as to minimize burning or disoomi'ort upon accidental contact therewith.

2. In a heating appliance, a heating means therefor, a metallic enclosure, and a coating covering the outside of said enclosure comprising flock held thereon by a cement, said coating being relatively thin so as not to be substantially heat insulating and having a large number of fibers projecting from said cement so as to minimize burning or discomfort upon accidental contact therewith.

3. In a heating appliance, a heating means therefor and a operating metallic member which is heated-during operation oi! the appliance to a temperature which would cause burning or discomfort to an operator upon accidental contact therewith, and a coating covering the surface of said metallic member comprising flock therewith.

m w. WARDWILL, Ja. 

